4ff2d527 |
1 | @ vim:filetype=armasm\r |
2 | \r |
cc68a136 |
3 | @ memory handlers with banking support for SSF II - The New Challengers\r |
4 | @ mostly based on Gens code\r |
5 | \r |
6cadc2da |
6 | @ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r |
cc68a136 |
7 | @ All Rights Reserved\r |
8 | \r |
9 | \r |
10 | \r |
11 | .text\r |
12 | \r |
13 | @ default jump tables\r |
14 | \r |
15 | m_read8_def_table:\r |
16 | .long m_read8_rom0 @ 0x000000 - 0x07FFFF\r |
17 | .long m_read8_rom1 @ 0x080000 - 0x0FFFFF\r |
18 | .long m_read8_rom2 @ 0x100000 - 0x17FFFF\r |
19 | .long m_read8_rom3 @ 0x180000 - 0x1FFFFF\r |
20 | .long m_read8_rom4 @ 0x200000 - 0x27FFFF\r |
21 | .long m_read8_rom5 @ 0x280000 - 0x2FFFFF\r |
22 | .long m_read8_rom6 @ 0x300000 - 0x37FFFF\r |
23 | .long m_read8_rom7 @ 0x380000 - 0x3FFFFF\r |
24 | .long m_read8_rom8 @ 0x400000 - 0x47FFFF\r |
25 | .long m_read8_rom9 @ 0x480000 - 0x4FFFFF\r |
26 | .long m_read8_romA @ 0x500000 - 0x57FFFF\r |
27 | .long m_read8_romB @ 0x580000 - 0x5FFFFF\r |
28 | .long m_read8_romC @ 0x600000 - 0x67FFFF\r |
29 | .long m_read8_romD @ 0x680000 - 0x6FFFFF\r |
30 | .long m_read8_romE @ 0x700000 - 0x77FFFF\r |
31 | .long m_read8_romF @ 0x780000 - 0x7FFFFF\r |
32 | .long m_read_null @ 0x800000 - 0x87FFFF\r |
33 | .long m_read_null @ 0x880000 - 0x8FFFFF\r |
34 | .long m_read_null @ 0x900000 - 0x97FFFF\r |
35 | .long m_read_null @ 0x980000 - 0x9FFFFF\r |
36 | .long m_read8_misc @ 0xA00000 - 0xA7FFFF\r |
37 | .long m_read_null @ 0xA80000 - 0xAFFFFF\r |
38 | .long m_read_null @ 0xB00000 - 0xB7FFFF\r |
39 | .long m_read_null @ 0xB80000 - 0xBFFFFF\r |
40 | .long m_read8_vdp @ 0xC00000 - 0xC7FFFF\r |
41 | .long m_read8_vdp @ 0xC80000 - 0xCFFFFF\r |
42 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
43 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
44 | .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r |
45 | .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r |
46 | .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r |
47 | .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r |
48 | \r |
49 | m_read16_def_table:\r |
50 | .long m_read16_rom0 @ 0x000000 - 0x07FFFF\r |
51 | .long m_read16_rom1 @ 0x080000 - 0x0FFFFF\r |
52 | .long m_read16_rom2 @ 0x100000 - 0x17FFFF\r |
53 | .long m_read16_rom3 @ 0x180000 - 0x1FFFFF\r |
54 | .long m_read16_rom4 @ 0x200000 - 0x27FFFF\r |
55 | .long m_read16_rom5 @ 0x280000 - 0x2FFFFF\r |
56 | .long m_read16_rom6 @ 0x300000 - 0x37FFFF\r |
57 | .long m_read16_rom7 @ 0x380000 - 0x3FFFFF\r |
58 | .long m_read16_rom8 @ 0x400000 - 0x47FFFF\r |
59 | .long m_read16_rom9 @ 0x480000 - 0x4FFFFF\r |
60 | .long m_read16_romA @ 0x500000 - 0x57FFFF\r |
61 | .long m_read16_romB @ 0x580000 - 0x5FFFFF\r |
62 | .long m_read16_romC @ 0x600000 - 0x67FFFF\r |
63 | .long m_read16_romD @ 0x680000 - 0x6FFFFF\r |
64 | .long m_read16_romE @ 0x700000 - 0x77FFFF\r |
65 | .long m_read16_romF @ 0x780000 - 0x7FFFFF\r |
66 | .long m_read_null @ 0x800000 - 0x87FFFF\r |
67 | .long m_read_null @ 0x880000 - 0x8FFFFF\r |
68 | .long m_read_null @ 0x900000 - 0x97FFFF\r |
69 | .long m_read_null @ 0x980000 - 0x9FFFFF\r |
70 | .long m_read16_misc @ 0xA00000 - 0xA7FFFF\r |
71 | .long m_read_null @ 0xA80000 - 0xAFFFFF\r |
72 | .long m_read_null @ 0xB00000 - 0xB7FFFF\r |
73 | .long m_read_null @ 0xB80000 - 0xBFFFFF\r |
74 | .long m_read16_vdp @ 0xC00000 - 0xC7FFFF\r |
75 | .long m_read_null @ 0xC80000 - 0xCFFFFF\r |
76 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
77 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
78 | .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r |
79 | .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r |
80 | .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r |
81 | .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r |
82 | \r |
83 | m_read32_def_table:\r |
84 | .long m_read32_rom0 @ 0x000000 - 0x07FFFF\r |
85 | .long m_read32_rom1 @ 0x080000 - 0x0FFFFF\r |
86 | .long m_read32_rom2 @ 0x100000 - 0x17FFFF\r |
87 | .long m_read32_rom3 @ 0x180000 - 0x1FFFFF\r |
88 | .long m_read32_rom4 @ 0x200000 - 0x27FFFF\r |
89 | .long m_read32_rom5 @ 0x280000 - 0x2FFFFF\r |
90 | .long m_read32_rom6 @ 0x300000 - 0x37FFFF\r |
91 | .long m_read32_rom7 @ 0x380000 - 0x3FFFFF\r |
92 | .long m_read32_rom8 @ 0x400000 - 0x47FFFF\r |
93 | .long m_read32_rom9 @ 0x480000 - 0x4FFFFF\r |
94 | .long m_read32_romA @ 0x500000 - 0x57FFFF\r |
95 | .long m_read32_romB @ 0x580000 - 0x5FFFFF\r |
96 | .long m_read32_romC @ 0x600000 - 0x67FFFF\r |
97 | .long m_read32_romD @ 0x680000 - 0x6FFFFF\r |
98 | .long m_read32_romE @ 0x700000 - 0x77FFFF\r |
99 | .long m_read32_romF @ 0x780000 - 0x7FFFFF\r |
100 | .long m_read_null @ 0x800000 - 0x87FFFF\r |
101 | .long m_read_null @ 0x880000 - 0x8FFFFF\r |
102 | .long m_read_null @ 0x900000 - 0x97FFFF\r |
103 | .long m_read_null @ 0x980000 - 0x9FFFFF\r |
104 | .long m_read32_misc @ 0xA00000 - 0xA7FFFF\r |
105 | .long m_read_null @ 0xA80000 - 0xAFFFFF\r |
106 | .long m_read_null @ 0xB00000 - 0xB7FFFF\r |
107 | .long m_read_null @ 0xB80000 - 0xBFFFFF\r |
108 | .long m_read32_vdp @ 0xC00000 - 0xC7FFFF\r |
109 | .long m_read_null @ 0xC80000 - 0xCFFFFF\r |
110 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
111 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
112 | .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r |
113 | .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r |
114 | .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r |
115 | .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r |
116 | \r |
117 | \r |
118 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
119 | \r |
120 | .bss\r |
121 | @.section .bss, "brw"\r |
122 | @.data\r |
123 | \r |
124 | @ used tables\r |
125 | m_read8_table:\r |
126 | .skip 32*4\r |
127 | \r |
128 | m_read16_table:\r |
129 | .skip 32*4\r |
130 | \r |
131 | m_read32_table:\r |
132 | .skip 32*4\r |
133 | \r |
134 | \r |
135 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
136 | \r |
137 | .text\r |
138 | \r |
139 | .global PicoMemReset\r |
140 | .global PicoRead8\r |
141 | .global PicoRead16\r |
142 | .global PicoRead32\r |
143 | .global PicoWriteRomHW_SSF2\r |
144 | \r |
145 | \r |
146 | PicoMemReset:\r |
147 | ldr r12,=(Pico+0x22204)\r |
148 | ldr r12,[r12] @ romsize\r |
149 | add r12,r12,#0x80000\r |
150 | sub r12,r12,#1\r |
151 | mov r12,r12,lsr #19\r |
152 | \r |
153 | ldr r0, =m_read8_table\r |
154 | ldr r1, =m_read8_def_table\r |
155 | mov r2, #32\r |
156 | 1:\r |
157 | ldr r3, [r1], #4\r |
158 | str r3, [r0], #4\r |
159 | subs r2, r2, #1\r |
160 | bne 1b\r |
161 | \r |
162 | ldr r0, =m_read16_table\r |
163 | ldr r1, =m_read16_def_table\r |
164 | mov r2, #32\r |
165 | 1:\r |
166 | subs r2, r2, #1\r |
167 | ldr r3, [r1], #4\r |
168 | str r3, [r0], #4\r |
169 | bne 1b\r |
170 | \r |
171 | ldr r0, =m_read32_table\r |
172 | ldr r1, =m_read32_def_table\r |
173 | mov r2, #32\r |
174 | 1:\r |
175 | subs r2, r2, #1\r |
176 | ldr r3, [r1], #4\r |
177 | str r3, [r0], #4\r |
178 | bne 1b\r |
179 | \r |
180 | @ update memhandlers according to ROM size\r |
181 | ldr r1, =m_read8_above_rom\r |
182 | ldr r0, =m_read8_table\r |
183 | mov r2, #16\r |
184 | 1:\r |
185 | sub r2, r2, #1\r |
186 | cmp r2, r12\r |
187 | blt 2f\r |
188 | cmp r2, #4\r |
189 | beq 1b @ do not touch the SRAM area\r |
190 | str r1, [r0, r2, lsl #2]\r |
191 | b 1b\r |
192 | 2:\r |
193 | ldr r1, =m_read16_above_rom\r |
194 | ldr r0, =m_read16_table\r |
195 | mov r2, #16\r |
196 | 1:\r |
197 | sub r2, r2, #1\r |
198 | cmp r2, r12\r |
199 | blt 2f\r |
200 | cmp r2, #4\r |
201 | beq 1b\r |
202 | str r1, [r0, r2, lsl #2]\r |
203 | b 1b\r |
204 | 2:\r |
205 | ldr r1, =m_read32_above_rom\r |
206 | ldr r0, =m_read32_table\r |
207 | mov r2, #16\r |
208 | 1:\r |
209 | sub r2, r2, #1\r |
210 | cmp r2, r12\r |
211 | blt 2f\r |
212 | cmp r2, #4\r |
213 | beq 1b\r |
214 | str r1, [r0, r2, lsl #2]\r |
215 | b 1b\r |
216 | 2:\r |
217 | bx lr\r |
218 | \r |
219 | .pool\r |
220 | \r |
221 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
222 | \r |
223 | PicoRead8: @ u32 a\r |
224 | ldr r2, =m_read8_table\r |
225 | bic r0, r0, #0xff000000\r |
226 | and r1, r0, #0x00f80000\r |
227 | ldr pc, [r2, r1, lsr #17]\r |
228 | \r |
229 | PicoRead16: @ u32 a\r |
230 | ldr r2, =m_read16_table\r |
231 | bic r0, r0, #0xff000000\r |
232 | and r1, r0, #0x00f80000\r |
233 | ldr pc, [r2, r1, lsr #17]\r |
234 | \r |
235 | PicoRead32: @ u32 a\r |
236 | ldr r2, =m_read32_table\r |
237 | bic r0, r0, #0xff000000\r |
238 | and r1, r0, #0x00f80000\r |
239 | ldr pc, [r2, r1, lsr #17]\r |
240 | \r |
241 | .pool\r |
242 | \r |
243 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
244 | \r |
245 | m_read_null:\r |
246 | mov r0, #0\r |
247 | bx lr\r |
248 | \r |
249 | \r |
250 | .macro m_read8_rom sect\r |
251 | ldr r1, =(Pico+0x22200)\r |
252 | bic r0, r0, #0xf80000\r |
253 | ldr r1, [r1]\r |
254 | .if \sect\r |
255 | orr r0, r0, #0x080000*\sect\r |
256 | .endif\r |
257 | eor r0, r0, #1\r |
258 | ldrb r0, [r1, r0]\r |
259 | bx lr\r |
260 | .endm\r |
261 | \r |
262 | \r |
263 | m_read8_rom0: @ 0x000000 - 0x07ffff\r |
264 | m_read8_rom 0\r |
265 | \r |
266 | m_read8_rom1: @ 0x080000 - 0x0fffff\r |
267 | m_read8_rom 1\r |
268 | \r |
269 | m_read8_rom2: @ 0x100000 - 0x17ffff\r |
270 | m_read8_rom 2\r |
271 | \r |
272 | m_read8_rom3: @ 0x180000 - 0x1fffff\r |
273 | m_read8_rom 3\r |
274 | \r |
275 | m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area\r |
276 | ldr r2, =(SRam)\r |
277 | ldr r3, =(Pico+0x22200)\r |
278 | ldr r1, [r2, #8] @ SRam.end\r |
279 | bic r0, r0, #0xf80000\r |
280 | orr r0, r0, #0x200000\r |
281 | cmp r0, r1\r |
282 | bgt m_read8_nosram\r |
283 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
284 | cmp r0, r1\r |
285 | blt m_read8_nosram\r |
286 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)\r |
287 | sub r12,r0, #0x200000\r |
288 | tst r1, #0x10\r |
289 | bne m_read8_detected\r |
290 | cmp r12,#1\r |
291 | ble m_read8_detected\r |
292 | tst r1, #1\r |
293 | orrne r1, r1, #0x10\r |
294 | strneb r1, [r3, #0x11]\r |
295 | m_read8_detected:\r |
296 | tst r1, #4 @ EEPROM read?\r |
297 | ldrne r0, =SRAMReadEEPROM @ (1ci if ne)\r |
298 | bxne r0\r |
299 | m_read8_noteeprom:\r |
300 | tst r1, #1\r |
301 | beq m_read8_nosram\r |
302 | ldr r3, [r2] @ SRam.data\r |
303 | ldr r2, [r2, #4] @ SRam.start (1ci)\r |
304 | sub r3, r3, r2\r |
305 | ldrb r0, [r3, r0]\r |
306 | bx lr\r |
307 | m_read8_nosram:\r |
308 | ldr r1, [r3, #4] @ 1ci\r |
309 | cmp r0, r1\r |
310 | movgt r0, #0\r |
311 | bxgt lr @ bad location\r |
312 | ldr r1, [r3]\r |
313 | eor r0, r0, #1\r |
314 | ldrb r0, [r1, r0]\r |
315 | bx lr\r |
316 | \r |
317 | m_read8_rom5: @ 0x280000 - 0x2fffff\r |
318 | m_read8_rom 5\r |
319 | \r |
320 | m_read8_rom6: @ 0x300000 - 0x37ffff\r |
321 | m_read8_rom 6\r |
322 | \r |
323 | m_read8_rom7: @ 0x380000 - 0x3fffff\r |
324 | m_read8_rom 7\r |
325 | \r |
326 | m_read8_rom8: @ 0x400000 - 0x47ffff\r |
327 | m_read8_rom 8\r |
328 | \r |
329 | m_read8_rom9: @ 0x480000 - 0x4fffff\r |
330 | m_read8_rom 9\r |
331 | \r |
332 | @ is any ROM using that much?\r |
333 | m_read8_romA: @ 0x500000 - 0x57ffff\r |
334 | m_read8_rom 0xA\r |
335 | \r |
336 | m_read8_romB: @ 0x580000 - 0x5fffff\r |
337 | m_read8_rom 0xB\r |
338 | \r |
339 | m_read8_romC: @ 0x600000 - 0x67ffff\r |
340 | m_read8_rom 0xC\r |
341 | \r |
342 | m_read8_romD: @ 0x680000 - 0x6fffff\r |
343 | m_read8_rom 0xD\r |
344 | \r |
345 | m_read8_romE: @ 0x700000 - 0x77ffff\r |
346 | m_read8_rom 0xE\r |
347 | \r |
348 | m_read8_romF: @ 0x780000 - 0x7fffff\r |
349 | m_read8_rom 0xF\r |
350 | \r |
351 | m_read8_misc:\r |
352 | bic r2, r0, #0x00ff\r |
353 | bic r2, r2, #0xbf00\r |
354 | cmp r2, #0xa00000 @ Z80 RAM?\r |
355 | ldreq r2, =z80Read8\r |
356 | bxeq r2\r |
357 | stmfd sp!,{r0,lr}\r |
358 | bic r0, r0, #1\r |
359 | mov r1, #8\r |
360 | bl OtherRead16\r |
361 | ldmfd sp!,{r1,lr}\r |
362 | tst r1, #1\r |
363 | moveq r0, r0, lsr #8\r |
364 | bx lr\r |
365 | \r |
366 | m_read8_vdp:\r |
367 | tst r0, #0x70000\r |
368 | tsteq r0, #0x000e0\r |
369 | bxne lr @ invalid read\r |
370 | stmfd sp!,{r0,lr}\r |
371 | bic r0, r0, #1\r |
372 | bl PicoVideoRead\r |
373 | ldmfd sp!,{r1,lr}\r |
374 | tst r1, #1\r |
375 | moveq r0, r0, lsr #8\r |
376 | bx lr\r |
377 | \r |
378 | m_read8_ram:\r |
379 | ldr r1, =Pico\r |
380 | bic r0, r0, #0xff0000\r |
381 | eor r0, r0, #1\r |
382 | ldrb r0, [r1, r0]\r |
383 | bx lr\r |
384 | \r |
385 | m_read8_above_rom:\r |
386 | stmfd sp!,{r0,lr}\r |
387 | bic r0, r0, #1\r |
388 | mov r1, #8\r |
66fdc0f0 |
389 | bl OtherRead16End\r |
cc68a136 |
390 | ldmfd sp!,{r1,lr}\r |
391 | tst r1, #1\r |
392 | moveq r0, r0, lsr #8\r |
393 | bx lr\r |
394 | \r |
395 | .pool\r |
396 | \r |
397 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
398 | \r |
399 | .macro m_read16_rom sect\r |
400 | ldr r1, =(Pico+0x22200)\r |
401 | bic r0, r0, #0xf80000\r |
402 | ldr r1, [r1]\r |
403 | bic r0, r0, #1\r |
404 | .if \sect\r |
405 | orr r0, r0, #0x080000*\sect\r |
406 | .endif\r |
407 | ldrh r0, [r1, r0]\r |
408 | bx lr\r |
409 | .endm\r |
410 | \r |
411 | \r |
412 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
413 | m_read16_rom 0\r |
414 | \r |
415 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
416 | m_read16_rom 1\r |
417 | \r |
418 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
419 | m_read16_rom 2\r |
420 | \r |
421 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
422 | m_read16_rom 3\r |
423 | \r |
424 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
425 | ldr r2, =(SRam)\r |
426 | ldr r3, =(Pico+0x22200)\r |
427 | ldr r1, [r2, #8] @ SRam.end\r |
428 | bic r0, r0, #0xf80000\r |
429 | bic r0, r0, #1\r |
430 | orr r0, r0, #0x200000\r |
431 | cmp r0, r1\r |
432 | bgt m_read16_nosram\r |
433 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r |
434 | tst r1, #1\r |
435 | beq m_read16_nosram\r |
436 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
437 | cmp r0, r1\r |
438 | blt m_read16_nosram\r |
439 | ldr r2, [r2] @ SRam.data (1ci)\r |
440 | sub r2, r2, r1\r |
441 | ldrh r0, [r2, r0] @ 2ci\r |
442 | and r1, r0, #0xff\r |
443 | mov r0, r0, lsr #8\r |
444 | orr r0, r0, r1, lsl #8\r |
445 | bx lr\r |
721cd396 |
446 | \r |
cc68a136 |
447 | m_read16_nosram:\r |
448 | ldr r1, [r3, #4] @ 1ci\r |
449 | cmp r0, r1\r |
450 | movgt r0, #0\r |
451 | bxgt lr @ bad location\r |
452 | ldr r1, [r3] @ 1ci\r |
453 | ldrh r0, [r1, r0]\r |
454 | bx lr\r |
455 | \r |
456 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
457 | m_read16_rom 5\r |
458 | \r |
459 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
460 | m_read16_rom 6\r |
461 | \r |
462 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
463 | m_read16_rom 7\r |
464 | \r |
465 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
466 | m_read16_rom 8\r |
467 | \r |
468 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
469 | m_read16_rom 9\r |
470 | \r |
471 | @ is any ROM using that much?\r |
472 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
473 | m_read16_rom 0xA\r |
474 | \r |
475 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
476 | m_read16_rom 0xB\r |
477 | \r |
478 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
479 | m_read16_rom 0xC\r |
480 | \r |
481 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
482 | m_read16_rom 0xD\r |
483 | \r |
484 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
485 | m_read16_rom 0xE\r |
486 | \r |
487 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
488 | m_read16_rom 0xF\r |
489 | \r |
490 | m_read16_misc:\r |
cc68a136 |
491 | bic r0, r0, #1\r |
4ff2d527 |
492 | mov r1, #16\r |
493 | b OtherRead16\r |
cc68a136 |
494 | \r |
495 | m_read16_vdp:\r |
496 | tst r0, #0x70000\r |
497 | tsteq r0, #0x000e0\r |
498 | bxne lr @ invalid read\r |
cc68a136 |
499 | bic r0, r0, #1\r |
4ff2d527 |
500 | b PicoVideoRead\r |
cc68a136 |
501 | \r |
502 | m_read16_ram:\r |
503 | ldr r1, =Pico\r |
504 | bic r0, r0, #0xff0000\r |
505 | bic r0, r0, #1\r |
506 | ldrh r0, [r1, r0]\r |
507 | bx lr\r |
508 | \r |
509 | m_read16_above_rom:\r |
cc68a136 |
510 | bic r0, r0, #1\r |
4ff2d527 |
511 | mov r1, #16\r |
512 | b OtherRead16End\r |
cc68a136 |
513 | \r |
514 | .pool\r |
515 | \r |
516 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
517 | \r |
518 | .macro m_read32_rom sect\r |
519 | ldr r1, =(Pico+0x22200)\r |
520 | bic r0, r0, #0xf80000\r |
521 | ldr r1, [r1]\r |
522 | bic r0, r0, #1\r |
523 | .if \sect\r |
524 | orr r0, r0, #0x080000*\sect\r |
525 | .endif\r |
526 | ldrh r0, [r1, r0]!\r |
527 | ldrh r1, [r1, #2] @ 1ci\r |
528 | orr r0, r1, r0, lsl #16\r |
529 | bx lr\r |
530 | .endm\r |
531 | \r |
532 | \r |
533 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
534 | m_read32_rom 0\r |
535 | \r |
536 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
537 | m_read32_rom 1\r |
538 | \r |
539 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
540 | m_read32_rom 2\r |
541 | \r |
542 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
543 | m_read32_rom 3\r |
544 | \r |
545 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
546 | ldr r2, =(SRam)\r |
547 | ldr r3, =(Pico+0x22200)\r |
548 | ldr r1, [r2, #8] @ SRam.end\r |
549 | bic r0, r0, #0xf80000\r |
550 | bic r0, r0, #1\r |
551 | orr r0, r0, #0x200000\r |
552 | cmp r0, r1\r |
553 | bgt m_read32_nosram\r |
554 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r |
555 | tst r1, #1\r |
556 | beq m_read32_nosram\r |
557 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
558 | cmp r0, r1\r |
559 | blt m_read32_nosram\r |
560 | ldr r2, [r2] @ SRam.data (1ci)\r |
561 | sub r2, r2, r1\r |
562 | ldrh r0, [r2, r0]! @ (1ci)\r |
563 | ldrh r1, [r2, #2]\r |
564 | orr r0, r0, r0, lsl #16\r |
565 | mov r0, r0, ror #8\r |
566 | mov r0, r0, lsl #16\r |
567 | orr r0, r0, r1, lsr #8\r |
568 | and r1, r1, #0xff\r |
569 | orr r0, r0, r1, lsl #8\r |
570 | bx lr\r |
721cd396 |
571 | \r |
cc68a136 |
572 | m_read32_nosram:\r |
573 | ldr r1, [r3, #4] @ (1ci)\r |
574 | cmp r0, r1\r |
575 | movgt r0, #0\r |
576 | bxgt lr @ bad location\r |
577 | ldr r1, [r3] @ (1ci)\r |
578 | ldrh r0, [r1, r0]!\r |
579 | ldrh r1, [r1, #2] @ (2ci)\r |
580 | orr r0, r1, r0, lsl #16\r |
581 | bx lr\r |
582 | \r |
583 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
584 | m_read32_rom 5\r |
585 | \r |
586 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
587 | m_read32_rom 6\r |
588 | \r |
589 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
590 | m_read32_rom 7\r |
591 | \r |
592 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
593 | m_read32_rom 8\r |
594 | \r |
595 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
596 | m_read32_rom 9\r |
597 | \r |
598 | @ is any ROM using that much?\r |
599 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
600 | m_read32_rom 0xA\r |
601 | \r |
602 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
603 | m_read32_rom 0xB\r |
604 | \r |
605 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
606 | m_read32_rom 0xC\r |
607 | \r |
608 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
609 | m_read32_rom 0xD\r |
610 | \r |
611 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
612 | m_read32_rom 0xE\r |
613 | \r |
614 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
615 | m_read32_rom 0xF\r |
616 | \r |
617 | m_read32_misc:\r |
618 | bic r0, r0, #1\r |
619 | stmfd sp!,{r0,lr}\r |
620 | mov r1, #32\r |
621 | bl OtherRead16\r |
622 | mov r1, r0\r |
623 | ldmfd sp!,{r0}\r |
624 | stmfd sp!,{r1}\r |
625 | add r0, r0, #2\r |
626 | mov r1, #32\r |
627 | bl OtherRead16\r |
628 | ldmfd sp!,{r1,lr}\r |
629 | orr r0, r0, r1, lsl #16\r |
630 | bx lr\r |
631 | \r |
632 | m_read32_vdp:\r |
633 | tst r0, #0x70000\r |
634 | tsteq r0, #0x000e0\r |
635 | bxne lr @ invalid read\r |
636 | bic r0, r0, #1\r |
4ff2d527 |
637 | add r1, r0, #2\r |
638 | stmfd sp!,{r1,lr}\r |
cc68a136 |
639 | bl PicoVideoRead\r |
4ff2d527 |
640 | swp r0, r0, [sp]\r |
cc68a136 |
641 | bl PicoVideoRead\r |
642 | ldmfd sp!,{r1,lr}\r |
643 | orr r0, r0, r1, lsl #16\r |
644 | bx lr\r |
645 | \r |
646 | m_read32_ram:\r |
647 | ldr r1, =Pico\r |
648 | bic r0, r0, #0xff0000\r |
649 | bic r0, r0, #1\r |
650 | ldrh r0, [r1, r0]!\r |
651 | ldrh r1, [r1, #2] @ 2ci\r |
652 | orr r0, r1, r0, lsl #16\r |
653 | bx lr\r |
654 | \r |
655 | m_read32_above_rom:\r |
656 | bic r0, r0, #1\r |
657 | stmfd sp!,{r0,lr}\r |
658 | mov r1, #32\r |
66fdc0f0 |
659 | bl OtherRead16End\r |
cc68a136 |
660 | mov r1, r0\r |
661 | ldmfd sp!,{r0}\r |
662 | stmfd sp!,{r1}\r |
663 | add r0, r0, #2\r |
664 | mov r1, #32\r |
66fdc0f0 |
665 | bl OtherRead16End\r |
cc68a136 |
666 | ldmfd sp!,{r1,lr}\r |
667 | orr r0, r0, r1, lsl #16\r |
668 | bx lr\r |
669 | \r |
670 | .pool\r |
671 | \r |
672 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
673 | \r |
674 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
675 | and r0, r0, #0xe\r |
676 | movs r0, r0, lsr #1\r |
677 | bne pwr_banking\r |
678 | \r |
679 | @ sram register\r |
680 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
721cd396 |
681 | ldrb r0, [r2]\r |
cc68a136 |
682 | and r1, r1, #3\r |
721cd396 |
683 | bic r0, r0, #3\r |
684 | orr r0, r0, r1\r |
685 | strb r0, [r2]\r |
cc68a136 |
686 | bx lr\r |
687 | \r |
688 | pwr_banking:\r |
689 | and r1, r1, #0x1f\r |
690 | \r |
691 | ldr r3, =m_read8_def_table\r |
692 | ldr r2, =m_read8_table\r |
693 | ldr r12, [r3, r1, lsl #2]\r |
694 | str r12, [r2, r0, lsl #2]\r |
695 | \r |
696 | ldr r3, =m_read16_def_table\r |
697 | ldr r2, =m_read16_table\r |
698 | ldr r12, [r3, r1, lsl #2]\r |
699 | str r12, [r2, r0, lsl #2]\r |
700 | \r |
701 | ldr r3, =m_read32_def_table\r |
702 | ldr r2, =m_read32_table\r |
703 | ldr r12, [r3, r1, lsl #2]\r |
704 | str r12, [r2, r0, lsl #2]\r |
705 | \r |
706 | bx lr\r |
721cd396 |
707 | \r |